baber/WOPTO huggingface dataset:
Patent CA-2237597-A1 (CA)
Title: Method and apparatus for maintaining channel priority in a multiple wireless communication system environment
Inventor: RAFFEL MICHAEL ALLEN
IPC: H04W16/16
Filed: 1997-06-11
Abstract: A method and system are disclosed for a transmitter to maintain priority on a communication channel in a multiple wireless communication system environment.  An exemplary method for maintaining priority includes transmitting a priority signal to maintain priority for the transmitter on the communication channel.  The priority signal may be pseudo-random noise (PRN) signals. In one embodiment, the PRN signals are transmitted in response to activity sensed on the communication channel, one cause of which may be a contending transmitter transmitting on the communication channel. In this embodiment the step of transmitting is for a predetermined duration and causes the contending transmitter to stop transmitting on the communication channel. In an alternate embodiment, the transmission of the PRN signals is periodic and occurs sufficiently often to cause the contending transmitter to abstain from ever transmitting on the communication channel.
Patent CA-2239334-A1 (CA)
Title: The umbrella holding harness
Inventor: CATLING JAMES PHILLIP
IPC: A45B11/02
Filed: 1998-07-27
Abstract: By using a specially designed body harness, holster, and clasp, an umbrella can be worn firmly on the body, thereby, freeing up the hands from holding the umbrella.
Patent CA-2239785-A1 (CA)
Title: Polariser made from brewster plates
Inventor: MAYER CLAUS
IPC: G03F7/20
Filed: 1996-12-06
Abstract: A polariser (14) for polarising by reflection, in particular for polarising ultraviolet light when wide apertures are used, is provided with transparent plane-parallel plates each of which is inclined at an angle to the light entering parallel to the optical axis (10). To improve transmission of p-polarised light and reduce transmision of s-polarised light, it is proposed that a number of plane-parallel plates should be inclined in the same direction relative to the optical axis (10) and arranged in a stack, the angle (17) of the incident light relative to the perpendicular (16) to the plate in question being within the Brewster angle range.
Patent CA-2240966-A1 (CA)
Title: Catalyst, process for its production and its use for preparing vinyl acetate
Inventor: DINGERDISSEN UWE
IPC: B01J37/34
Filed: 1998-06-04
Abstract: The invention relates to a process for producing supported shell catalysts comprising noble metals by UV photoreduction of noble metal salt precursors fixed to a support. For this purpose, the shaped supported body is impregnated with suitable noble metal salts which are then reduced to the metals in a zone close to the surface by means of UV radiation, preferably in the absence of a chemical reducing agent. The metal salts in the interior of the pellets which have not been irradiated and therefore have not been reduced are extracted using a solvent.       The noble metal shell catalysts produced in this way can be used for many heterogeneously catalyzed reactions such as hydrogenations and oxidations.       According to the invention, Pd/Au shell catalysts on porous ceramic supports, e.g. SiO2 shaped bodies, produced by this process can be used in the synthesis of vinyl acetate.
Patent CA-2244924-A1 (CA)
Inventor: FATHI REZA
IPC: C07H15/18
Filed: 1997-01-22
Abstract: A phosphorus ester oligomer having structure (I) wherein A can be the same or different in each monomeric unit and each is independently selected from the group consisting of oxygen, sulfur, lower alkyl, substituted or unsubstituted alkylamino, substituted or unsubstituted arylamino and aminoalkyl; B1 and B2 can be the same or different and each is independently selected from hydrogen, lower alkyl, a labelling group, a protecting group, a phosphoramidate or a phosphomonoester; R1 can be the same or different in each monomeric unit, and in at least one of the non-nucleotide monomeric units, R1 is independently selected from the group consisting of a condensation product of (i) a non-vicinal diol attached to a hydrogen bond donor functionality; (ii) a hydrogen bond acceptor selected from an ether, a purine or pyrimidine substituted 1,2-diol or a disubstituted heterocycle; (iii) a non-vicinal diol attached to a hydrophobic functionality or a vicinal diol attached to an aliphatic or alicyclic hydrophobic functionality; (iv) a diol attached to a ring substituted anionic functionality and (v) a cationic moiety attached to a non-vicinal or alicyclic diol, any of which can further include a detectable label, and n is at least one. Preferred R1 moieties include condensation products of heterocyclic diols, alicyclic diols, and polycyclic diols. Also the non-nucleotide monomers thereof, combinatorial library mixtures of the oligomers and the use of the oligomers as selective target-binding compounds.
Patent CA-2245881-A1 (CA)
Title: Method and arrangement for channel allocation in a radio communications system
Inventor: BEMING PER JOHAN
IPC: H04Q7/22
Filed: 1997-02-12
Abstract: The present invention relates to a method and an arrangement for channel allocation in a radio communication system in which data is transmitted between two stations over two or more radio channels (SPDCH3-SPDCH7). Data is communicated as packets which are divided into blocks (b1-bm) while the transmission follows a protocol for automatic re-transmission of data that have been erroneously transmitted.      In accordance with the proposed method, channels for re-transmission (SPDCH5, SPDCH6) are allocated with respect to a transmission parameter (TP), which has been created at a previous transmission and which is based upon information of the result (Nack) of said previous transmission. The transmission parameter (TP) is aimed to ensure that re-transmission is performed via those channels (SPDCH5, SPDCH6) which have the highest probability of transmitting data correctly. The channels (SPDCG5, SPDCH6) which had the highest transmission quality in said previous transmission are expected to have the highest transmission quality also by re-transmission.
Patent CA-2246504-A1 (CA)
Title: Downhole flow stimulation in a natural gas well
Inventor: COX EGBERT LEONARDUS
IPC: E21B43/25
Filed: 1997-03-05
Abstract: Fluid flow in a natural gas well is stimulated by means of a downhole multi-stage rotary compressor (10) which is driven by an electric motor (6).  Preferably the compressor shaft (9) is equipped with gas journal bearings (12), the motor is a brushless permanent magnet motor which is capable of operating at a speed above 5000 RPM and which directly drives the compressor shaft (9), and the production tubing (1) is thermally insulated by evacuated the surrounding annular space.
Patent CA-2252191-A1 (CA)
Inventor: CHIU SHUN-KUO
IPC: H01R13/453
Filed: 1998-11-18
Abstract: A safety socket head includes a socket housing which has a first socket slot and a second socket slot parallelly provided thereon, a first shelter means which is slidably supported inside the socket housing and positioned below the first socket slot for blocking the first socket slot during a normal condition, a second shelter means which is slidably supported inside the socket housing and positioned below the second socket slot for blocking the second socket slot during the normal condition, and a resilient means for retaining the first and the second shelter means in the normal condition so as to shelter any undesired substance to intrude into either the first socket slot or the second socket slot. However, when the two plug plates of an electrical plug are inserted into the first and second socket slots simultaneously, the two plug plates drive both the first and the second shelter means to slide aside respectively to enable the two plug plates to insert therethrough into the socket body. Moreover, when the two plug plates are detached from the safety socket head, the resilient means inside the socket housing respectively push the first and the second shelter means to slide back to the normal condition.
Patent CA-2252390-A1 (CA)
Title: Reciprocating fluid pump with improved bottle seal
Inventor: FOSTER DONALD D
IPC: B05B11/00
Filed: 1997-04-17
Abstract: A fluid pump (20) comprises a dispenser body (22), closure cap (54), seal assembly (34), and priming check valve (88). The dispenser body (22) has a pump (24), discharge port (102), and a discharge path (76). The closure cap (54) is connected to the dispenser body (22) and closes the mouth of the container (56). A first portion (60) of seal assembly (34) prevents leakage between closure cap (54) and the mouth of the container (56) when the closure cap (54) closes the mouth of the container (56). A second portion (62) of the seal assembly (34) has an intake port (78) for fluid communication with liquid in the container (56). The second portion (62) and dispenser body (22) define an intake path. A check valve (88) in the intake path permits fluid flow from the intake port (78) to the pump (24) and for checking fluid flow from the pump (24) to the intake port (78). The second portion (62) of the seal assembly (34) comprises at least part of the check valve (88).
Patent CA-2254842-A1 (CA)
Title: Method, apparatus and processing plant for sterilizing and/or heat treating particulate products
Inventor: CHRISTIANSEN VERNER
IPC: B01F29/63
Filed: 1997-08-19
Abstract: A method, an apparatus and a plant for sterilization and/or heat treatment of products in particle form, for example bone meal, said product being introduced in batches into a pressure vessel which lies substantially horizontal, in that said pressure vessel is arranged to rotate and is provided on the inside with a built-in helical vane arrangement along the inner wall/jacket of the pressure vessel. The pressure vessel (5) is closed and evacuated of air and heated, said heating being effected by supplying steam to the vessel's jacket (4) and also possibly by the supply of steam under pressure to the inside of the vessel. The heating and pressure treatment is effected for a given period of time, in that the process parameters are a function of the product to be treated. The pressure vessel is made to rotate, said rotation giving rise to a mixing/movement of the particle-formed product and, as a consequence of the inner vane arrangement, the movement of the product from the one end of the vessel to the other. The process vessel is then relieved of pressure, after which the heat treated/sterilized product is emptied from the process vessel and the batch process starts from the beginning. There is hereby achieved an apparatus and a method with a continuous and uniform mixing and sterilization of the product with optimum utilization of the vessel's capacity, while at the same time there is little risk of defects arising in the apparatus and during the process itself.
Patent CA-2255298-A1 (CA)
Title: Communication method for packet switching systems
Inventor: HAGGLUND BARRY BENJAMIN
IPC: H04L12/56
Filed: 1998-12-07
Abstract: A method of communicating data frames between nodes in a network comprised of one or more end system nodes where each end system node has a unidirectional ingress port and a unidirectional egress port. The method comprises transmitting a data frame from an egress port of one end system node to the ingress port of another end system node, the receiving end system node then determining whether it is the final destination for the data frame. If the receiving end system node is the final destination of the data frame, the receiving end system node absorbs the message. If not, the receiving end system node buffers and then retransmits the data frame through its own egress port.      The method provides scalability, low cost, distributed pipeline scheduling, maximum complexity of the network fabric, and maximum speed.
Patent CA-2257395-A1 (CA)
Title: Device for external treatment with pulsating light of high duty cycle
Inventor: THIBERG ROLF
IPC: A61N5/06
Filed: 1997-06-04
Abstract: Apparatus for external medical treatment with light, comprising a light-emitting device which is intended to lie against or to be held in the close proximity of the body of an individual, and a drive device for driving the light-emitting device, wherein the light-emitting device includes light-emitting diodes or corresponding elements and is adapted to emit monochromatic light of a first wavelength, wherein the drive device (8, 9, 10) is adapted to cause the light-emitting device (1) to emit the monochromatic light over a first predetermined time period in a first stage and thereafter emit selectively monochromatic light of a different wavelength than the first wavelength over a second predetermined time period in a possible second stage, and wherein the drive device (8, 9, 10) is adapted to cause the light-emitting device (1) to pulsate the emitted light in accordance with a predetermined pulse frequency or series of pulse frequencies over the time periods.      The invention is characterized in that the drive device (8, 9, 10) is adapted to cause the light-emitting devices to emit the pulsating light with a pulse length that lies within an interval of about 60 % to 90 % of the time between respective start edges (18, 19) of two mutually sequential pulses (15).
Patent CA-2263984-A1 (CA)
Inventor: HEINLE GEORG
IPC: H02P21/22
Filed: 1997-08-13
Abstract: This invention concerns a current control process for a voltage converter, wherein a detected flux-inducing current component (isp) and a detected torque-inducing currrent component (isq) of an actual currrent vector (is) of a rotating field machine are each controlled for a flux-inducing current component set value (i*sp) and a torque-inducing current component set value (i*sq) of the rotating field machine. To that effect, a control set-value (.DELTA.u*sp, .DELTA.u*sq) is determined, dependent each time upon a determined current component control deviation. From these, current components (u*sp, u*sq) of an actual current vector (<u>u</u>*s) are formed each time by overlay of a formed pilot value (u*spvor, u*sqvor). This invention also concerns a device for carrying out this process. According to the invention, an exact flux-inducing current component (ispk) of the rotational field machine is formed dependent on the flux-building current components (isp) formed, an amount of the machine flux vector (|.PHI.s|) formed, and on a value of the machine's main inductance (LH). This component (ispk) as the flux-inducing current component (isp) is compared to the flux-inducing current component set value (i*sp). By using the exact flux-building current components, the moment error in the mistuning of the parameter (L.sigma., LH) of two-component current regulation disappearts.
Patent CA-2265799-A1 (CA)
Title: Open-celled rigid polyurethane foam
Inventor: GRUENBAUER HENRI J M
IPC: C08G101/00
Filed: 1997-12-12
Abstract: Disclosed is a process for preparing an open-celled rigid polyurethane foam by r eacting a polyisocyanate with a polyol in the presence of a blowing agent, usually water, and a cell opening agent. The cell o pening agent comprises a combination of a polyoxyalkylene polysiloxane having a cloud point of 65.degree.C or less, and a second substance that has a critical surface free energy of less than about 23mJ/m2. Highly preferred as second substance is fine particulate poly(tetrafluorethylene ) polymer.
Patent CA-2273809-A1 (CA)
Inventor: RUPNIAK NADIA MELANIE
IPC: A61P43/00
Filed: 1997-11-25
Abstract: La présente invention a pour objet l'utilisation d'un antagoniste du NK-1, à action prolongée, agissant sur le système nerveux central; et administré par voie orale, dans la fabrication d'un médicament pouvant être administré par voie orale permettant de traiter ou de prévenir les diskynésies. L'invention traite également de procédés de traitement à l'aide d'un antagoniste du récepteur NK-1 et de compositions pharmaceutiques comprenant cet antagoniste.
Patent CA-2275055-A1 (CA)
Inventor: DAVIS FRANK CLIFFORD
IPC: B60Q5/00
Filed: 1999-06-14
Abstract: The described invention is designed to be used to sound a vehicle horn without moving the operator's hand from the normal steering position on the steering wheel.  The invention may be added to an existing steering wheel, or added during the manufacture of a steering wheel. The invention consists of two electrical conductors which are mounted on the inner perimeter of the steering wheel and are both contained in a flexible tube. These electrical elements are held close to each other and are parallel, but are fastened in such a way that the element in contact with the steering wheel is immovable, and the other element, which is normally held away from the immovable element, can be pressed into contact with the immovable element. The elements are held normally out of contact by fastening the movable contact in place under tension. Both elements are electrically connected in parallel with the existing horn button(s), so that the original horn actuator is still fully functional.
Patent CA-2276069-A1 (CA)
Title: Implantable sensor employing an auxiliary electrode
Inventor: BRUNSMAN ALAN R
IPC: G01N27/30
Filed: 1997-12-31
Abstract: An implantable sensor (32) comprising a bio-compatible electroconductive case (42) which houses a measuring electrode (34), a reference electrode (36), an auxiliary electrode (38), and an electronic circuit (40) for measuring the response of the measuring electrode where the measuring electrode, reference electrode and auxiliary electrode are not in direct contact with one another is provided. The implantable sensor of the present invention is particularly useful as a glucose sensor, especially when an enzyme-containing membrane is included in the measuring electrode.
Patent CA-2278168-A1 (CA)
Inventor: HAYWARD STEPHEN DAVID
IPC: H01Q3/26
Filed: 1999-05-19
Abstract: The invention provides an adaptive sensor array apparatus (100) incorporating a multielement antenna (12) for receiving radiation from a scene ('S') and generating signals (e) in response thereto and a processing unit (114) for processing the signals (e) to provide an output signal (y). The unit (114) comprises an adaptive weight computer (136) arranged to generate weighting vectors (w) which are used in the unit (114) to attenuate contributions to the output signal (y) arising from sources of jamming radiation in the scene and transmit contributions to the output signal (y) arising from wanted targets therein. The apparatus (100) incorporates a non-adaptive beamformer unit (132) for preconditioning the signals (e) before they are passed to the computer (136). Preconditioning the signals (e) enhances performance of the apparatus (100) relative to conventional adaptive sensor array apparatus (10).
Patent CA-2280746-A1 (CA)
Title: Silent damper with anti-rattle shaft
Inventor: WACH JOE
IPC: F16F9/02
Filed: 1999-08-26
Abstract: The damper includes a housing assembly and a piston assembly with reciprocates within the cylindrical walls of the housing assembly. The piston assembly is formed from two disks which are spaced apart by a spacer with includes radially and longitudinally oriented planar projections which extend to a position radially inward of a periphery of the disks. The distal ends of the projections form longitudinally oriented surfaces upon which a toroidal seal slidably rides. At least one of the longitudinally oriented surfaces includes an air communication groove in communication with a groove on the trailing disk which extends to the periphery of the trailing disk. When the piston assembly is retracted from the housing assembly, the seal engages the leading disk thereby inhibiting air from flowing through the air communication groove thereby effectuating damping. However, when the piston assembly is inserted into the housing assembly, the seal engages the trailing disk thereby allowing air to flow through the air communication groove thereby eliminating or minimizing damping.      The- cap of the housing is formed by portions of elastic O-rings which extend across the mouth of the housing slidably retaining the piston shaft.
Patent CA-2281787-A1 (CA)
Title: Phase mask with spatially variable diffraction efficiency
Inventor: EHBETS PETER
IPC: G03F1/00
Filed: 1998-02-11
Abstract: A phase mask (15) for modulating a collimated light beam passing therethrough, the light beam being diffracted to photoinduce a refractive index profile in a photosensitive optical medium, the phase mask (15) comprises a substrate (17) having an outer surface provided with a plurality of parallel grating corrugations (19). The grating corrugations (19) have a non-uniform relief depth across the outer surface for photoinducing a non-uniform refractive index profile in the photosensitive optical medium. The non-uniform relief depth is defined by a variable thin film layer (21) of variable thickness overlaying the substrate (17). The grating corrugations (19) can either be etched into the variable thin film layer (21) itself or be etched into the substrate (17), with the variable thin film layer (21) being deposited on it after etching. Methods to make such phase masks are also provided.
Patent CA-2288134-A1 (CA)
Title: Improved automatic surgical device and control assembly for cutting a cornea
Inventor: HELLENKAMP JOHANN F
IPC: A61F9/00
Filed: 1998-04-24
Abstract: A surgical device for cutting substantially across a cornea of an eye of a patient, the device including a positioning ring structured to be temporarily attached to a portion of the eye surrounding the cornea to be cut, and defining an aperture sized to receive and expose the cornea to be cut. The surgical device further includes a cutting head assembly structured to be guided and driven over an upper surface of the positioning ring in a generally arcuate path, and having a cutting element positioned therein and structured to oscillate laterally to facilitate smooth and effective cutting of the cornea. The cutting head assembly is structured to be detachably coupled to the positioning ring by a coupling member which permits movement of the cutting head assembly relative to the positioning ring along the generally arcuate path, but maintains sufficient engagement therebetween to ensure that smooth, steady, driven movement is maintained.
Patent CA-2288961-A1 (CA)
Title: Rotor blade, in particular for helicopter antitorque tail rotor
Inventor: MOUILLE RENE
IPC: B64C27/35
Filed: 1999-03-16
Abstract: The invention concerns a rotor blade, in particular for helicopter antitorque tail rotor, comprising: a blade shank (3) mounted rotating in said rotor hub (4E), to enable said blade to rotate about its step axis (P-P); and means for fixing said rotor shank (3) to said rotor hub, including a member capable of elastic twist deformation about said step axis. The invention is characterised in that: said blade shank (3) is hollow and open at its inner end so as to comprise an internal recess (12); said member capable of elastic twist deformation consists of an elastic stop (15) housed inside said blade shank internal recess (12) and capable of functioning like a spherical mounting with limited action, centred on said step axis; and a rigid tie rod (6) connects said elastic stop to said rotor hub (4C).